Showing papers on "Pentacene published in 1977"
TL;DR: In this paper, the photon-echo lifetime of pentacene-h 14 and -d 14 in p -terphenyl- h 14 at 1.5 K was determined using two nitrogen pumped dye-lasers.
48 citations
TL;DR: Pentacene films on quartz were prepared by vapour deposition at various substrate temperatures and their absorption spectra measured as discussed by the authors, which showed that the organic films prepared at high substrate temperatures are homogeneous, consisting of fair size crystallites oriented with their abplanes parallel to the substrate surface.
41 citations
TL;DR: In this paper, the resonant phonon that induces the optical phase relaxation process is shown to be of u -symmetry and its lifetime is obtained from the previously reported photon-echo relaxation results.
30 citations
TL;DR: In this article, the kinetics of electronic energy transfer from host to guest have been measured for a tetracene crystal doped with pentacene, and with single picosecond pulse excitation and streak camera diagnostics, the fluorescence risetime of the guest is measured to be the same as the decay time of the host.
29 citations
TL;DR: In this article, the authors conclude that pentacene for its lowest 1B2u ← 1A1g transition is a perfect two-level system and from the power saturation term in the OFID, calculate a transition dipole moment of 1.5 ± 0.2 debye.
21 citations
TL;DR: In this paper, the energy distribution curves of secondary electrons and scattered electrons with the characteristic energy loss from pentacene and coronene polycrystals have been measured and fine structures were observed in the secondary electron spectra for both materials.
8 citations
TL;DR: In this article, the surfaces of thin films of perylene, pentacene, violanthrene, and mesonaphthodianthrene were studied by means of X-ray photoelectron spectroscopy.
Abstract: The oxidation of the surfaces of thin films of perylene, pentacene, violanthrene, and mesonaphthodianthrene on exposure to oxygen or to the air was studied by means of X-ray photoelectron spectroscopy. A perylene film was found to be the least reactive toward oxygen among the above four hydrocarbons. In the cases of pentacene and violanthrene films, a single, broad O 1s peak grew up with time over the period of a few months as the exposure to the air was prolonged. On exposure to oxygen, a mesonaphthodianthrene film exhibited the O 1s spectrum which apparently consisted of two peaks located at the binding energies, 531.0 and 532.9 eV respectively, and the peak at 532.9 eV reduced its intensity irreversibly on heating the film in a high vacuum, suggesting that it was the one associated with a loosely bound oxygen.
1 citations